Dynamics of Non-equilibrium Short-wave-length Phonons in Semiconductor Heterostructures | Zendy

Dmitry Romanov | Zendy; Julia Eizenkop | Zendy; Vladimir Mitin | Zendy

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Dynamics of Non-equilibrium Short-wave-length Phonons in Semiconductor Heterostructures

Author(s) -

Dmitry Romanov,

Julia Eizenkop,

Vladimir Mitin

Publication year - 2001

Publication title -

vlsi design

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.123

H-Index - 24

eISSN - 1065-514X

pISSN - 1026-7123

DOI - 10.1155/2001/24532

Subject(s) - phonon , condensed matter physics , heterojunction , physics , scattering , dispersion relation , dispersion (optics) , electron , transverse plane , boundary value problem , quantum mechanics , structural engineering , engineering

The behavior of short-wave-length acoustic phonons in the vicinity of a quantum well ina GaAs/AlGaAs heterostructure has been investigated. Hot two-dimensional electronsin the well produce longitudinal optical phonons, which decay into almost monoenergeticshort-wave-length longitudinal acoustic (LA) phonons. The latter undergoelastic scattering and down-conversion into transverse acoustic (TA) phonons. The distributionof the LA and TA phonons over frequency and distance to the well havebeen found by solving semi-analytically a system of two kinetic equations with nontrivialboundary conditions and nonlinear dispersion. The distribution functions haveessentially non-temperature form even at substantial distance from the well

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